# SDR ABXA20260407152

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 7, 2026
- Submitted: April 9, 2026
- Operation: Air carrier
- Aircraft: [N312AA](https://openairdocs.org/aircraft/N312AA), registered now
- Make and model: Boeing 767223
- Aircraft serial: 22315
- Aircraft time: 95,971 hours, 25,281 cycles
- System (JASC): [2130 · Cabin Pressure Control System](https://openairdocs.org/jasc/2130)
- Part: Shutoff Valve
- Part number: 7998014
- Part serial: 2020061111
- Condition: Defective
- Location: Cabin Pressure
- Part time: 972 hours, 5 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: B, A, I
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ABXA20260407152

## Discrepancy

IN CRUISE AT 4000', CABIN ALT HIGH LIGHT & WARNING CAME ON INITIATED EMERGENCY DESCENT AND LT PACK OFF, LEFT BLEED EICAS MSG CAME ON DURING DESCENT THEN CLEARED. CREW DECLARED AN EMERGENCY FOR DEPRESSURIZATION AND DIVERTED TO MDT.  FOUND D24 LOOSE ON HPC, TIGHTENED SOME. REPLACED LT ENGINE PRSOV PER AMM 36-11-09. A/C REMAINS NO ETOPS. SYSTEM CHECKS NORMAL. RAN ENGINE PER AMM 71-00-00, DUCT PRESSURE NORMAL.  A/C RETURNED TO SERVICE.

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